improvement -> all suported types now display a 'Checking configuration file' task during the initialization process

bauh/commons/config.py

@@ -1,6 +1,9 @@
 import os
+import traceback
+from abc import abstractmethod, ABC
 from pathlib import Path
 from threading import Thread
+from typing import Optional
 
 import yaml
 
@@ -31,3 +34,69 @@ def read_config(file_path: str, template: dict, update_file: bool = False, updat
 def save_config(config: dict, file_path: str):
     with open(file_path, 'w+') as f:
         f.write(yaml.dump(config))
+
+
+class ConfigManager(ABC):
+
+    @abstractmethod
+    def read_config(self) -> Optional[dict]:
+        pass
+
+    @abstractmethod
+    def get_default_config(self) -> dict:
+        pass
+
+    @abstractmethod
+    def is_config_cached(self) -> bool:
+        pass
+
+    def get_config(self) -> dict:
+        default_config = self.get_default_config()
+
+        if default_config:
+            cached_config = self.read_config()
+
+            if cached_config:
+                self.merge_config(default_config, cached_config)
+
+        return default_config
+
+    @staticmethod
+    def merge_config(base_config: dict, current_config: dict):
+        util.deep_update(base_config, current_config)
+
+    @abstractmethod
+    def save_config(self, config_obj: dict):
+        pass
+
+
+class YAMLConfigManager(ConfigManager, ABC):
+
+    def __init__(self, config_file_path: str):
+        self.file_path = config_file_path
+
+    def is_config_cached(self) -> bool:
+        return os.path.exists(self.file_path)
+
+    def read_config(self) -> Optional[dict]:
+        if self.is_config_cached():
+            with open(self.file_path) as f:
+                local_config = yaml.safe_load(f.read())
+
+            if local_config is not None:
+                return local_config
+
+    def save_config(self, config_obj: dict):
+        if config_obj:
+            config_dir = os.path.dirname(self.file_path)
+            try:
+                Path(config_dir).mkdir(parents=True, exist_ok=True)
+            except OSError:
+                traceback.print_exc()
+                return
+
+            try:
+                with open(self.file_path, 'w+') as f:
+                    f.write(yaml.dump(config_obj))
+            except:
+                traceback.print_exc()